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MSHA mine register by county

Mines in Monterey County, California

Monterey County, California has 34 mines on MSHA's register: 6 active, 28 abandoned. 1 miner has died and 310 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 1,747 citations.

Every mine MSHA has registered in Monterey County, working or not, with the accident, fatality and citation record each one carries on this site. Active mines are listed first, then the rest by the weight of their record.

Abandoned and historical mine features in Monterey County →

Mines on register
34
Active
6
Fatalities on record
1
Citations issued
1,747
1 underground · 29 surface · 4 facilities 0 coal · 34 metal and non-metal 28 abandoned 310 reported accidents, 1983–2026
Local economic context
ⓘ County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Monterey County, California · Population 435,834
0.0%
Mining share of county employment
$94,486
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
On the map 
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MSHA-registered mine, any status

Mines plot only where MSHA holds a surveyed coordinate for the site; mines the agency locates to a town, county or state centroid are in the counts and the list above but not drawn. Click a point for the mine's status and record.

Operators with the most mines herecurrent operator of record
Operator Mines Active Fatalities
Monterey Sand Company Inc 5 0 0
SWIFT TECTONICS, INC. 4 0 0
Granite Construction Company 3 1 0
Granite Rock Company 2 0 0
The Don Chapin Company, Inc. 2 2 0
Wm J Clark Trucking Service Inc 2 1 0
Lhoist North America of Arizona Inc. 1 1 1
Calportland Construction 1 0 0
Cemex Construction Materials Pacific LLC 1 0 0
Dennis Ponte Inc 1 0 0
Mines in Monterey County34 on register
  1. NATIVIDAD PLANT
    Surface metal/non-metal · Lhoist North America of Arizona Inc. · MSHA ID 0400156
    Active
  2. Hidden Canyon Quarry
    Surface metal/non-metal · San Benito Supply · MSHA ID 0405653
    Active
  3. CLARK PIT
    Surface metal/non-metal · Wm J Clark Trucking Service Inc · MSHA ID 0404119
    Active
  4. Handley Ranch Quarry
    Surface metal/non-metal · Granite Construction Company · MSHA ID 0405629
    Active
  5. Pine Canyon Quarry
    Surface metal/non-metal · The Don Chapin Company, Inc. · MSHA ID 0404795
    Active
  6. Marina Landfill
    Surface metal/non-metal · The Don Chapin Company · MSHA ID 0405993
    Active
  7. Lapis Plant
    Surface metal/non-metal · Cemex Construction Materials Pacific LLC · MSHA ID 0402843
    Abandoned
  8. King City Mill
    Facility metal/non-metal · KCAC Inc · MSHA ID 0401062
    Abandoned
  9. Soledad Quarry
    Surface metal/non-metal · Syar Industries Inc · MSHA ID 0404906
    Abandoned
  10. Sand City Pit And Mill
    Surface metal/non-metal · Monterey Sand Company Inc · MSHA ID 0401862
    Abandoned
  11. Chieftan Power Screen
    Facility metal/non-metal · Swift Tectonics Inc · MSHA ID 0405411
    Abandoned
  12. Metz Plant
    Surface metal/non-metal · Granite Construction Co · MSHA ID 0404517
    Abandoned
  13. Bradley Plant
    Surface metal/non-metal · Calportland Construction · MSHA ID 0405572
    Abandoned
  14. Marina Pit And Mill
    Surface metal/non-metal · Monterey Sand Company Inc · MSHA ID 0401861
    Abandoned
  15. BRADLEY PLANT & BORROW PIT
    Surface metal/non-metal · Madonna Construction Company · MSHA ID 0405184
    Abandoned
  16. PANCHO RICO SAND AND GRAVEL
    Surface metal/non-metal · SWIFT TECTONICS, INC. · MSHA ID 0405624
    Abandoned
  17. ARROYO SECO PIT
    Surface metal/non-metal · Wm J Clark Trucking Service Inc · MSHA ID 0405025
    Abandoned
  18. Del Monte Quarry
    Surface metal/non-metal · Granite Construction Co · MSHA ID 0400087
    Abandoned
  19. Dolomite Materials Branch
    Surface metal/non-metal · Granite Rock Company · MSHA ID 0405158
    Abandoned
  20. CHALONE CREEK RESOURCES
    Surface metal/non-metal · Swift Tectonics Inc · MSHA ID 0405412
    Abandoned
  21. ECHENIQUE PIT
    Surface metal/non-metal · Swift Tectonics Inc · MSHA ID 0405413
    Abandoned
  22. Chalone Pits And Mills
    Surface metal/non-metal · King City Transit Mix Inc · MSHA ID 0401857
    Abandoned
  23. County Pits And Mill
    Surface metal/non-metal · Monterey County Road Department · MSHA ID 0401529
    Abandoned
  24. Dennis Ponte Incorporated Portable
    Surface metal/non-metal · Dennis Ponte Inc · MSHA ID 0405167
    Abandoned
  25. Fleming Pit
    Surface metal/non-metal · Los Laureles Granite Co · MSHA ID 0400182
    Abandoned
  26. Hilltown Bar
    Surface metal/non-metal · T J Smith Company · MSHA ID 0403795
    Abandoned
  27. Marina Dryer & Dredge
    Facility metal/non-metal · Monterey Sand Company Inc · MSHA ID 0403797
    Abandoned
  28. Mariposa Mine
    Underground metal/non-metal · Myron John Koenig · MSHA ID 0401333
    Abandoned
  29. Parker Canyon
    Surface metal/non-metal · Henningsen Construction Company · MSHA ID 0400132
    Abandoned
  30. Pico Blanco
    Surface metal/non-metal · Granite Rock Company · MSHA ID 0404544
    Abandoned
  31. Prattco
    Surface metal/non-metal · Lone Star Industries Inc · MSHA ID 0401899
    Abandoned
  32. Sand City Beach Plant
    Surface metal/non-metal · Monterey Sand Company Inc · MSHA ID 0404876
    Abandoned
  33. Sand City Dryer
    Facility metal/non-metal · Monterey Sand Company Inc · MSHA ID 0403796
    Abandoned
  34. Valley Rock And Sand Plant
    Surface metal/non-metal · Valley Rock & Sand Company · MSHA ID 0401994
    Abandoned

Status, type and operator are as reported to MSHA. Fatality and accident counts are MSHA's reportable accident records for the mine; citations are inspector-issued violations on record. Each mine's own page carries the full detail.

Other counties in CaliforniaAll counties →
How to read these numbers

The register is MSHA's Mine Data Retrieval System: every operation ever assigned a mine ID, including ones abandoned decades ago, so the count is a history of mining in the county, not a count of working mines. A mine's county is the one its operator reported to MSHA. Fatality and accident counts start with MSHA's reportable-accident records (1983 onward); citation counts are inspector-issued violations on record. We are an independent research tool, not MSHA.